Yiddish/German word for crap, garbage, trash, etc. The kind of shit that you don't want to step in, and if you do, you'll be walking funny for the next two blocks in an attempt to scrape it off your shoe.
The term is sometimes used to refer to Luke fon Fabre, protagonist of the game "Tales of the Abyss."
Ew, you went out with that slut? She's total dreck. Dump her immediately.